Scraper for disk drills.



PATENTED AUG. 4, 1903.

W. FETZER.

SGRAPER FOR DISK DRILLS.

APPLICATION FILED SEPT. 27, 1902.

N0 MODEL.

mhhwoaay Tatented August 4, 190?:

PATENT OFFICE.

WILLIAM FETZER, OF MIDDLETOWN, OHIO.

SC RAPER FOR DISK DRILLS.

JPECIFICATION forming part of Letters Patent No. 735,487, dated August 4, 1903.

Application filed September 27,1902. Serial No. 125,110. (No model.)

To all whom it may concern.-

Be it known that I, WILLi AM FETZER, a citizen of the United States, residing at Middletown, in the county of Butler and State of Ohio, have invented certain-new and useful Improvements in Scrapers for Disk Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 7

This invention relates to improvements in disk drills,.and particularly to scraping means adapted to prevent clogging of the disk and retardation of the rotation thereof.

1 The object in view is the prod-notion, in combination with a disk drill, of means for preventing trash or any foreign substance from being carried by the disk and engaging the drag-bar or other parts supported by the said disk whereby the disk may be prevented from free rotation. In accomplishing this object I employ a scraping means which covers the entire radius of the disk and is made up of a plurality of separate parts, one part being preferably carriedby the grain-chute and the other by one leg of the drag-bar. The invention consists in certain novel constructions, combinations, and arrangements of parts, as will be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 represents a perspective view of one disk of a disk drill, with the attachments therefor,

carrying an embodiment of my improved scraper. Fig. 2 represents a detail perspective View of one section of a scraper. Fig. 3 represents a detail perspective view of the other section thereof.

In the use of disk drills it is well known that the disks are liable to collect more or less foreignmatter, which engages the parts carried by the disk and to some extent performs the function of a brake, retarding rotation of the disk and of course to that extent preventing perfect operation thereof. To overcome this difficulty, various forms of scrapers have been employed which are adapted 'to engage the concaved surface of the disk, but only extending throughout a portion of the radius thereof, and, as far as I am aware, in no instance has the common form of scraper been made to lie contiguous to the periphery of the disk, whereby the soft soil and pebbles are free when the ordinary scraper is used to pass the same upon the periphery of the disk and engaging with some fixed part retard the rotation thereof. The inner portion of the disk has also usually been left free, so that foreign matter might be carried thereby and become compacted between the drag-bar and the surface of the disk, it of course being understood in the art that anything preventing free rotation of the disk is seriously objectionable. I have therefore constructed a scraper made up of separate elements and extending in such positions as to fully cover the entire radius of the disk and prevent the carriage by the disk of any foreign matter.

As seen in the accompanying drawings, one

embodiment of the present inclosed scraper includes, in combination with a suitable disk 1, grain-chute 2 and double drag-bars 3, a

rear section 4, and a front section 5, the rear section being carried by the chute 2 in any suitable manner and being formed with an arm 6, extending to a point approximate to the periphery of the disk 1 and bent at such point at substantially a right angle and forming blade 7, curved to fit the concavity of said disk. The blade 7 extends from the periphery of the disk 1 almost entirely across its radius and is retained either in contact with or close to the surface of the disk, so as to dislodge any matter carried thereby. The front section 5 of the scraper consists of a blade 8, carried by a body portion 9, partially surrounding and clamped about one leg of drag-bar 3, the body portion 9 extending rearwardly and being formed into a dust-cap 10 for the bearings of disk 1, the axle 11 thereof extending through the cap 10. The blade 8 extends from a point approximately the center of the disk 1 outwardly considerably beyond the point of intersection of a curved line corresponding on the disk to the inner-end of blade 7, said blade 8 being bent or beveled to fit within the contour of the disk 1, said bent or beveled form facilitating the direction of foreign matter from the disk and preventing foreign matter collecting between the disk 1 and the leg of drag-bar 3, carrying blade 8.

It is'obvious, of course, that the section 4 of the scraper may be employed independently of section 5 and accomplishes alone the valuable function of keeping the periphery and the greater portion of the concavity of the disk 1 free from foreign substances. However, only the best results can be obtained by the employment of both sections, and section 5 is used in connection with the disk drill whenever the common form of double drag-bar, asindicated in the drawings, is employed, it not being practical to use the section 5 in connection with a one-leg drag-bar. The section 5 may also be employed without the use of section 4 and will not only keep the disk clean, but will also perform the very valuable function of preventing lodging of foreign substances between the leg of the drag-bar carrying it and the disk regardless of the employment of section 4, said section 5 extending to and beyond the vertical plane of the said leg of the drag-bar.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a disk-scraper, the combination with a disk and a drag-bar, of a scraper inclosing a portion of said drag-bar and connecting the same with the axle of said disk and extending from the center of the disk outwardly along the drag-bar and forminga shed extending from the. disk to the bar closing the space therebetween, substantially as described.

2. In a disk-scraping mechanism, the combination with a disk, a drag-bar, an axle-engaging means carried by said bar, of a scraper carried by the drag-bar rising from the said axle-engaging means and extending from approximately the centerof the disk outwardly and forming a shedover the space between the said bar and the disk.

3. In a device of the class described, the combination with a suitable disk, a dragbar, a grain-chute and a section of scraper carried by the grain-chute, of a section of scraper carried by the drag-bar and complementing the said first-mentioned section of the hub of the disk and extending along the edge of the disk drag-bar, and the other member projecting inwardly from the outer edge of the disk, and means for supporting the same upon the grain-chute, substantially as described.

5. A disk-scraping mechanism comprising in combination with a disk, drag-bar and grain-chute, a hub member and a peripheral member, the hub member extending along the drag-bar and covering the hub of the disk,

the edge of said hub member being inclined to the radii of the disk and covering the central portion of the'disk while the peripheral member scrapes the outer edge of the disk overlapping the portion engaged by the hub member, substantially as described.

6. In a device of the class described, the combination with a suitable disk and dragbar, of a scraper carried by said bar for removing foreign substances from said disk, inclosing a portion of said drag-bar and extending across the space between the bar and disk, substantially as described.

7. In a disk-scraper, the combination with a disk and a drag-bar, of a scrape inclosing the end of said bar and extending from the center of the disk outwardly and bridging the space between said disk and bar, substantially as described.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

WILLIAM FETZER.

Witnesses:

A. C. FREEZE, CHAS. KENT. 

